Simultaneous Determination of 11 Heavy Metals Elements in Grain and Vegetables by Inductively Coupled Plasma Mass Spectrometry with Microwave Digestion
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KeyWord:microwave digestion  inductively coupled plasma mass spectrometry  heavy metals elements  grain and vegetable
WANG Xue-mei,DU Tong-tong,WANG Juan,DU Xin-zhen,LU Xiao-quan 1.西北师范大学化学化工学院;2.甘肃省生物电化学与环境分析重点实验室
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      In this paper,a method was established for the analysis of 11 heavy metal elements(Cu,Mn,Cr,Pb,Cd,Ni,Sb,Hg,Co,Ag,As) in grain and vegetables using inductively coupled plasma mass spectrometry(ICP-MS) with microwave digestion.The instrumental parameters and microwave digestion conditions were optimized.Samples were digested completely using HNO3-HF-H2O2 and HNO3-H2O2.And the results showed that the linear correlation cofficients of eleven elements(r) were not less than 0.999 5,the limits of detection were in the range of 0.001-10.00 μg/L and the relative standard deviations(RSD,n=5) were not more than 5.0%.This method has the advantages of rapidness,simplicity,high sensitivity,good stability and accuracy.